"Pre Mature end of file"

[tina sani]

I am getting this type of error/exception: Pre Mature end of file". Is this
coming from reading a file which is empty or something else?
I have written this code
 InputStream in = FileManager.get().open( somefile
if (in == null) {
throw new IllegalArgumentException( "File: " + file + "  no file exist");
}
model.read(in,""); );